Window Defogger System: Inspection

1. Inspect operation of the defogger switch indicator.

   Standard: 

   Fig 1: Measurement Condition And Specified Condition Chart

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   If the result is not as specified, replace the air conditioning control assy.

   Fig 2: Inspecting Operation Of Defogger Switch Indictor

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2. Inspect the defogger switch continuity.

   Standard: 

   Fig 3: Defogger Switch Continuity Chart

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   If the result is not as specified, replace the air conditioning control assy.

   Fig 4: Inspecting Defogger Switch Continuity

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1. Inspect the mirror defogger operation.

   Standard: 

   Fig 5: Outer Rear View Mirror Assy LH (W/Outer Mirror Heater) Chart

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   If the result is not as specified, replace the mirror assy.

   Fig 6: Inspecting Outer Rear View Mirror Assy (W/Outer Mirror Heater)

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1. Inspect the mirror defogger operation.

   Standard: 

   Fig 7: Outer Rear View Mirror Assy RH (W/Outer Mirror Heater) Chart

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   If the result is not as specified, replace the mirror assy.

   Fig 8: Inspecting Outer Rear View Mirror Assy RH (W/Outer Mirror Heater)

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1. Turn the ignition switch ON.
2. Turn the defogger switch ON.
3. Inspect the voltage at the center of each heat wire as shown in Fig 10 .
   Fig 10: Inspecting Voltage At Center Of Each Heat Wire

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   Standard: 

   BACK WINDOW (DEFOGGER WIRE)
   
   

   Voltage	Criteria
   Approx. 5 V	Okay wire is not broken
   Approx. 10 V or 0 V	Wire is not broken

   HINT:

   If there is approximately 10 V, the wire may be broken between the center of the wire and the positive (+) end. If there is no voltage, the wire may be broken between the center of the wire and ground.

4. Place the voltmeter positive (+) lead against the defogger wire on the battery side.
   Fig 11: Placing Voltmeter Positive Lead Against Defogger Wire On Battery Side

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5. Place the voltmeter negative (-) lead with the foil strip against the wire on the ground side.
6. Slide the positive (+) lead from battery to ground side.
7. The point where the voltmeter deflects from several V to 0 V is the place where the defogger wire is broken.

   HINT:

   If the defogger wire is not broken, the voltmeter indicates 0 V at the positive (+) end of the defogger wire but gradually increases to about 12 V as the meter probe moves to the other end.

8. If necessary, repair the defogger wire.
   1. Clean the broken wire tips with grease, wax and silicone remove.
   2. Place the masking tape along the both sides of the wire.
      Fig 12: Placing Masking Tape Along Sides Of Wire

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   3. Thoroughly mix the repair agent (DuPont paste No. 4817).
   4. Using a fine tip brush, apply a small amount of the agent to the wire.
      Fig 13: Applying Small Amount Of Agent To Wire

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   5. After a few minutes, remove the masking tape.
   NOTE: Do not repair the defogger wire for at least 24 hours.

1. Inspect the continuity.

Standard: 

Fig 14: Defogger Relay (Marking: DEF) Chart)

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If the result is not as specified, replace the relay.

Fig 15: Inspecting Defogger Relay (Marking: DEF)

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